Failed to detach volume AttributeError: 'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'

[Mike Lowe]

Similar to https://bugs.launchpad.net/nova/+bug/1942345 lack of alias handling for LibvirtConfigGuestHostdevMDEV causes volume detach to fail following an upgrade to Caracal.

2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [None req-fe679559-73ae-41f5-9bf7-346e998345b4 1405cdbc6158472e9e358a772965d4d8 55d7efb46dd945a2b86f7ce8aa657e1a - - 863ca4dddb2f43
d8a8919758eccbc23a 863ca4dddb2f43d8a8919758eccbc23a] [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] Failed to detach volume 2e394be5-b166-43d0-abe9-2b6f3eb07dbd from /dev/sdb: AttributeError
: 'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] Traceback (most recent call last):
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/block_device.py", line 413, in dr
iver_detach
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] virt_driver.detach_volume(context, connection_info, instance, mp,
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2831, in
 detach_volume
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] self._detach_with_retry(
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2540, in
 _detach_with_retry
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] self._detach_from_live_with_retry(
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2600, in
 _detach_from_live_with_retry
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] live_dev = get_device_conf_func()
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/libvirt/driver.py", line 2799, in
 _get_guest_disk_device
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] dev = guest.get_device_by_alias(
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] File "/usr/lib/python3/dist-packages/nova/virt/libvirt/guest.py", line 420, in g
et_device_by_alias
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] if dev.alias == devalias:
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173] AttributeError: 'LibvirtConfigGuestHostdevMDEV' object has no attribute 'alias'
2024-07-22 14:07:41.931 2455748 ERROR nova.virt.block_device [instance: effa9902-ffdf-4f32-b3b8-a3afa76a2173]

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/nova/+/925037